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Seth Mainguy

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Seth Mainguy

Portland, OR (Remote)

Phone: 555-0142 | Email: seth.mainguy@example.com

Website: https://example.com | GitHub: https://github.com/example/smainguy

Summary

Senior platform engineer with 12+ years building internal developer platforms, Kubernetes estates, and production observability for product organizations. Leads paved-road adoption across AWS and GCP, owns GitOps/CI delivery, and partners with security and networking on private connectivity. Strong in Go and Python automation, Terraform/Helm, and incident leadership—comfortable translating cost, risk, and reliability tradeoffs for engineering directors.

Technical Skills

CI / CD & GitOps: Argo CD GitHub Actions Helm GitOps Trunk-based development
Cloud & Containers: Kubernetes EKS GKE AWS GCP Linux Docker
Data & Messaging: PostgreSQL Amazon MSK Kafka Pub/Sub
Infrastructure as Code: Terraform Terragrunt Ansible
Languages: Go Python Bash SQL
Observability & Reliability: Prometheus Grafana OpenTelemetry Alertmanager Loki On-call / RCA
Security: IAM Vault External Secrets Network policies

Experience

Staff Platform Engineer
Meridian Analytics, Remote | Jan 2022 – Present
  • Own the internal Kubernetes platform (EKS + GKE) that runs 80+ production services for analytics and customer-facing APIs, with paved-road onboarding for product teams.
  • Lead GitOps delivery with Argo CD and Helm; standardize environment promotion, canary hooks, and rollback runbooks so teams ship without ticketed infrastructure changes.
  • Design Terraform modules for VPC peering, private service connectivity, RDS, and managed Kafka; cut average service time-to-first-deploy from weeks to days.
  • Build the observability baseline—Prometheus, Grafana, OpenTelemetry collectors, and Alertmanager routing—and drive SLO adoption for the top revenue-critical paths.
  • Automate cluster upgrades, node lifecycle, and certificate rotation in Go and Python; remove recurring toil from the platform on-call rotation.
  • Partner with security on least-privilege IAM, External Secrets, and network policies; shepherd SOC2 evidence collection for control changes.
  • Lead multi-region failover drills and blameless postmortems; turn incident findings into backlog items that reduced repeat Sev-1s.
  • Mentor four platform engineers and run weekly office hours that unblock product squads on Kubernetes, networking, and CI failures.
Senior Platform Engineer
Lattice Systems, Portland, OR / Hybrid | Mar 2018 – Dec 2021
  • Grew a greenfield developer platform from a handful of VMs to a multi-cluster Kubernetes estate supporting three product lines.
  • Implemented GitHub Actions and Argo CD pipelines that replaced ad-hoc Jenkins jobs; enforced trunk-based development and signed image promotion.
  • Delivered shared Terraform stacks for AWS accounts, IAM roles, and RDS blueprints used by every new service team.
  • Stood up centralized logging and metrics (Loki, Prometheus, Grafana) and wrote on-call playbooks that cut mean time to diagnose by roughly half for common failures.
  • Built internal Go CLI tooling for service scaffolding, secrets bootstrap, and environment diffs used daily by application engineers.
  • Led incident response for customer-facing outages involving Kafka lag and database failover; authored durable RCA docs and lasting fixes.
  • Collaborated with networking on private connectivity patterns (PrivateLink / PSC) so SaaS integrations no longer required public endpoints.
DevOps Engineer
Northwind Digital, Seattle, WA | Jun 2015 – Feb 2018
  • Automated Linux fleet provisioning and application deploys with Ansible and early Docker workflows for a B2B SaaS product.
  • Migrated critical services onto Kubernetes and introduced Helm charts for consistent staging and production configuration.
  • Built CI pipelines that ran unit tests, image builds, and smoke deploys on every merge; reduced release friction for a team of twelve engineers.
  • Operated PostgreSQL replicas, backup verification, and restore drills; documented recovery procedures used during an after-hours disk failure.
  • Owned monitoring for web and worker tiers; added actionable alerts that reduced overnight paging noise by consolidating duplicate checks.
  • Supported production on-call and paired with developers on performance hotspots (N+1 queries, connection pool exhaustion).
Systems Administrator
Cascade Hosting, Eugene, OR | Aug 2012 – May 2015
  • Administered shared and dedicated Linux hosting for small-business customers, including DNS, Apache/Nginx, MySQL, and mail stacks.
  • Wrote Bash and Python automation for account provisioning, SSL renewals, and abuse triage that reduced ticket handle time.
  • Hardened hypervisor and storage hosts; coordinated planned maintenance windows with transparency to paying customers.
  • Trained junior admins on escalation paths, runbooks, and customer communication during outages.
Junior Systems Technician
Willamette Tech Support, Salem, OR | May 2010 – Jul 2012
  • Provided tier-1/2 support for Windows and Linux desktops in small offices; imaged machines and managed inventory.
  • Built simple monitoring checks and backup scripts that caught failing drives before data loss.
  • Documented recurring fixes into a wiki that became the team's first shared knowledge base.

Education

B.S. Computer Science | Oregon State University | Corvallis, OR | June 2012

Certifications

  • Certified Kubernetes Administrator (CKA)
  • AWS Certified Solutions Architect – Associate
  • HashiCorp Certified: Terraform Associate